Hi Renata,

That's part of Elated Listing plugin, so you'll have to translate that plugin labels as well...

Hello Renata, 

Here is detailed explanation how you should translate your website :

Just install this software http://poedit.net/wordpress on your computer. Then run ithttp://screencast.com/t/wv1A4XtTKbz and import en_US po file from your theme folder/languages into the program.

Next translate your labels like in the screenshot http://screencast.com/t/LhyzzhLJMda and check your site again.

If your site admin is in another language (other than English) then click here to create new po filehttp://screencast.com/t/gliXcWMMoHuy for your language.

Import en_US file from theme folder/language http://screencast.com/t/GTU9BisAcIw and select your new language from the Translation Language dropdown menuhttp://screencast.com/t/tBz2EbaA64fA and translate like advised previously.

When you've finished translating, upload your new .po files to languages folder on your live server.

If you don't want to loose changes after theme update, install and activate child theme. Then inside child theme create folder language and copy your translation files there. At last paste this function into child theme functions.php file

if(!function_exists('eltd_load_child_theme_domain')) {
    function eltd_load_child_theme_domain() {
        load_theme_textdomain('eltd', get_stylesheet_directory().'/languages');
    }
    add_action('after_setup_theme', 'eltd_load_child_theme_domain');
}

And to translate labels in plugins, which is really important for this theme, please follow explanation bellow:

When you translate labels from plugins in this case in  folder wp-content/plugins/eltd-listing/languages you have to change the file names after you generate .po and .mo files. You need to give new names by following this rule: domain-locale.po and domain-locale.mo . In your case you have to rename files e.g. ,if you translate to Portuguese , to  eltd_listing-pt_BR .mo and eltd_listing-pt_BR .po and translate labels from that new po file. 

And  'Keywords' label you need to translate direct in code in this file wp-content\plugins\eltd-listing\post-types\listing\shortcodes\templates\listing-search-template.php, and  you need to change name of placeholder http://screencast.com/t/H29Z6k3f .

Thanks